The performance of UV curable coatings is directly linked to the quality and efficiency of their constituent components, particularly the photoinitiator. 4-Phenylbenzophenone, identified by CAS 2128-93-0, is a cornerstone for formulators seeking superior results in demanding coating applications. As a leading chemical manufacturer and supplier, we offer insights into the technical advantages this compound provides for advanced UV coatings.

Understanding the Chemistry of 4-Phenylbenzophenone

4-Phenylbenzophenone is classified as a Type II photoinitiator, meaning it requires a co-initiator, typically a tertiary amine, to generate the necessary free radicals for polymerization. Its molecular structure, C19H14O, with a molecular weight of 258.31, features a unique long-wave absorbing chromophore. This characteristic is crucial for effective initiation, especially in pigmented or thicker coating layers where UV penetration can be a challenge. Key technical data points include:

  • Appearance: White to off-white powder.
  • Melting Point: 99-101 °C, indicating good handling stability.
  • Purity: Typically ≥99%, ensuring consistent performance and minimizing side reactions.
  • UV Absorption Peak: Around 289 nm, making it effective for initiating polymerization when exposed to appropriate UV wavelengths.

Performance Advantages in UV Coatings

For formulators, the benefits of incorporating 4-Phenylbenzophenone into their UV coating systems are multifaceted:

  • Through Cure and Surface Cure: While its through-cure performance is generally rated as good, it is often enhanced when used in combination with other photoinitiators or synergists, providing balanced curing throughout the coating layer.
  • Pigmented Systems: Its absorption characteristics make it particularly suitable for pigmented UV coatings, where it can effectively initiate polymerization even in the presence of UV-absorbing pigments.
  • Low Odor Potential: Compared to some other photoinitiators, 4-Phenylbenzophenone offers a lower odor profile, which is a significant advantage for interior coatings or consumer-facing products.
  • Versatility: It can be used in various coating types, including those for wood, plastics, and metal, offering a broad application scope for manufacturers.

Reliable Sourcing from a Leading Manufacturer

Securing a consistent and high-quality supply of 4-Phenylbenzophenone is vital for maintaining production standards. As a dedicated manufacturer and supplier based in China, we pride ourselves on delivering a product that meets rigorous specifications. If you are looking to buy 4-Phenylbenzophenone or need detailed technical data, including Safety Data Sheets (SDS) and Certificates of Analysis (COA), we are equipped to meet your requirements. Contact us for a quote and discuss how our reliable supply can benefit your operations.

Conclusion

4-Phenylbenzophenone (CAS 2128-93-0) represents a technically sound choice for formulators aiming to optimize UV curable coatings. Its specific chemical properties and consistent performance, backed by a reliable manufacturer, make it an essential ingredient for achieving durable, high-quality finishes across a range of industrial applications.